Digestive System Functions and Processes

The video explains the digestion process, starting with mechanical and chemical digestion in the mouth, where food is broken down by chewing and enzymes. It then moves through the esophagus to the stomach, where enzymes and acids further digest food into chyme. The chyme enters the small intestine, where nutrients are absorbed. Finally, the large intestine absorbs water, and waste is expelled. The entire process can take up to three days.

What is the primary purpose of digestion?

• To increase body temperature

• To eliminate waste from the body

• To store food for later use

• To break down food for energy

Which type of digestion involves enzymes breaking down food?

• Mechanical digestion

• Physical digestion

• Thermal digestion

• Chemical digestion

What enzyme in saliva helps break down carbohydrates?

• Lipase

• Pepsin

• Trypsin

• Salivary amylase

What is the role of the esophagus in digestion?

• To absorb nutrients

• To produce digestive enzymes

• To mix food with bile

• To transport food to the stomach

What protects the stomach lining from its acidic environment?

• A coat of enzymes

• A layer of villi

• A lining of mucus

• A shield of bile

Where does most nutrient absorption occur?

• In the stomach

• In the large intestine

• In the esophagus

• In the small intestine

What are villi and what is their function?

• Tiny hair-like structures that absorb nutrients

• Cells that produce bile

• Small glands that secrete enzymes

• Muscles that move food along the intestine

What is the primary function of the large intestine?

• To produce enzymes

• To break down fats

• To absorb water

• To digest proteins

What happens to chyme in the large intestine?

• It is mixed with bile

• It is absorbed into the bloodstream

• It becomes solid waste

• It is broken down into proteins

How long can the entire digestion process take?

• One day

• A week

• A few hours

• Two to three days